CDC Plava oilseed flax (Linum usitatissimum L.), registered in 2015 by the Crop Development Centre, University of Saskatchewan, Saskatoon, SK, Canada, is targeted to the shorter growing season and the Dark Brown, Black, Grey, and Dark Grey soil zones of the northern prairies. This cultivar has a high seed yield (106%) compared with cultivar CDC Bethune and a medium maturity rating equal to Prairie Thunder. It has medium oil content (47.0%), α-linolenic acid content (57.8%), seed size (6.1 g 1000-seed weight), and good lodging resistance. It is resistant to North American races of rust caused by Melampsora lini (Ehrenb.) Thüm. and moderately resistant to wilt caused by Fusarium oxysporum Schltdl. f. sp. lini (Bolley) W.C. Snyder & H.N. Hansen.